Ergonomically-based adaptive massage chair and method of use

Abstract

The present invention relates to the technical field of massage chairs, and specifically to an ergonomically-adaptive massage chair and a method of using the massage chair, comprising a chair back frame, a cross bar that can be moved up and down is installed on the surface of the chair back frame, adjustment plates that can be moved left and right are installed on both ends of the cross bar, a pad is rotatably connected to the surface of each adjustment plate, an elastic supporting structure is installed between each pad and the adjustment plate, a friction assembly is installed between each pad and the adjustment plate, and the friction assembly is used to limit the rotation of the pad, a connecting block is fixedly connected to one side of each pad, and a rotating shaft is fixedly connected to the upper and lower ends of each connecting block, and each rotating shaft is rotatably connected to the adjustment plate. The purpose of the present invention is to solve the problem that the muscles on both sides of the back of an overweight user cannot be well massaged and supported in an existing massage chair.

Description

Technical Field

[0001] The present invention relates to the technical field of massage chairs, and in particular to an ergonomically-based adaptive massage chair and a method of using the same. Background Art

[0002] Ergonomics is a discipline that studies various factors such as anatomy, physiology, and psychology of people in a certain working environment, and makes equipment, tools, working environment, etc. adapt to human body functions through design to improve work efficiency, safety, comfort and health level. For example, when designing car seats, it is necessary to consider data such as human hip width and thigh length. Through the collection and analysis of a large number of human measurements, such as height, weight, limb length, range of joint motion, etc., the size range of product design is determined to ensure that the width and height of the seat can fit the body size of most users, so that people feel comfortable during driving and have enough space to stretch their legs. For example, maintaining a posture for a long time will cause muscle fatigue and poor blood circulation. When designing office desks and chairs, it is necessary to consider how to make the desktop height and seat design allow users to maintain a natural and comfortable sitting posture to avoid excessive tension in the neck, shoulders and waist. By studying the physiological responses of the human body in different postures and working conditions, the human spine has its natural physiological curve, cervical lordosis, thoracic kyphosis, and lumbar lordosis. The seat back that conforms to this curve can better support the back and reduce spinal pressure.

[0003] Among them, the ergonomic massage chair is a health care device that combines ergonomic principles with massage functions. It is based on ergonomic knowledge such as human body measurement data, physiological characteristics and psychological characteristics, so that the size, shape, angle, etc. of the massage chair are adapted to the form and movement laws of various parts of the human body, allowing the user to be in a natural and comfortable state during the massage, reducing fatigue and discomfort caused by improper posture, maximizing the effect of massage, and improving the comfort and effectiveness of massage.

[0004] Existing massage chairs have greatly different physical characteristics when facing overweight users. Overweight users have wider backs, and the backrests of conventional massage chairs cannot completely cover the backs. This will result in the muscles on both sides of the back not being well massaged and supported during the massage, and some muscle groups being left out, affecting the massage effect. The structural design of massage chairs still has limitations. Summary of the invention

[0005] The purpose of the present invention is to provide an ergonomically adaptive massage chair and a method of use, so as to solve the problem that when facing an overweight user, the muscles on both sides of the back of the user cannot be well massaged and supported by the existing massage chair.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An ergonomically adaptive massage chair includes a chair back frame, a cross bar that can be moved up and down is installed on the surface of the chair back frame, adjustment plates that can be moved left and right are installed at both ends of the cross bar, a pad is rotatably connected to the surface of each adjustment plate, an elastic supporting structure is installed between each pad and the adjustment plate, and a friction component is installed between each pad and the adjustment plate, and the friction component is used to limit the rotation of the pad.

[0008] Preferably, one side of each of the pads is fixedly connected to a connecting block, the upper and lower ends of each of the connecting blocks are fixedly connected to a rotating shaft, and each of the rotating shafts is rotatably connected to the adjustment plate.

[0009] Preferably, the number of the friction components is the same as the number of rotating shafts, and the friction components include friction blocks and friction rings. Each friction ring is fixedly connected to each rotating shaft in a one-to-one correspondence, and the friction blocks are horizontally movably arranged inside the adjustment plate.

[0010] Preferably, a first threaded rod is rotatably connected to the surface of the friction block, and a threaded groove for horizontal movement of the first threaded rod is cooperatively formed inside the adjustment plate.

[0011] Preferably, a rotatable third threaded rod is disposed on both sides of the seat back frame, and a threaded hole for the third threaded rod to movably thread through is provided on the surface of each adjustment plate.

[0012] Preferably, the lower end of the third threaded rod is rotatably connected to a support rod, and the surface of the chair back frame is provided with a sixth sliding groove for the support rod to move left and right, and a fourth motor is fixedly installed on the bottom end of the support rod, and the output end of the fourth motor is coaxially fixedly connected to the lower end of the third threaded rod.

[0013] Preferably, a cushion is installed on the surface of each of the backing plates, and a massage component is installed inside each of the cushions.

[0014] Preferably, the massage assembly includes a second motor and a massage ball rack, the second motor is fixedly mounted on the surface of the cushion, the massage ball rack is located inside the cushion, and the second motor is used to drive the massage ball rack to rotate.

[0015] Preferably, the output end of the second motor is coaxially fixedly connected with a square plate, the surface of the massage ball rack is provided with a fourth slide groove for horizontal movement of the square plate, a second threaded rod is rotatably connected in the fourth slide groove, and the movable thread of the second threaded rod passes through the surface of the square plate, a third motor is fixedly installed on the surface of the massage ball rack, and the output end of the third motor is coaxially fixedly connected with one end of the second threaded rod.

[0016] The specific steps of using the ergonomic adaptive massage chair are as follows:

[0017] A. Move the adjustment plate left and right to drive the pad and cushion to move and adjust the distance between the two cushions;

[0018] B. Move the adjustment plate up and down to drive the crossbar, pad and cushion to move up and down to adjust the height of the cushion;

[0019] C. When the user sits on the massage chair and leans back against the chair, the back cushion is pressed and rotated, and the elastic support structure between the pad and the adjustment plate undergoes elastic deformation. When the user leans back against the chair, the back is supported by the chair back frame. At the same time, the back cushion is adaptively supported on both sides of the user's back under the elastic force of the elastic support structure, and then the friction component is activated to limit the rotation of the pad;

[0020] D. Start the second motor to drive the massage ball rack to rotate, so as to massage the muscles on both sides of the user's back.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By setting the back cushion and the elastic support structure, when the user lies on the massage chair, the back cushion will be squeezed by the user's back and rotated. When the user leans on the chair back frame, the back cushion will also be adaptively supported on both sides of the user's back under the elastic force of the elastic support structure. Then, the massage components in the back cushion can massage the muscles on both sides of the user's back, which is helpful to prevent the situation that the muscles on both sides of the back of overweight users cannot be well massaged and supported.

[0023] 2. By setting the horizontal bar to move up and down, the height of the cushion can be adjusted, so that the user can control the cushion to support it in the most comfortable position for himself, and prevent the situation that the back side of the user cannot be well matched due to the difference in height of the user, and a comfortable massage cannot be performed;

[0024] 3. By setting the adjustment plate to move horizontally, the distance between the two cushions can be adjusted. For overweight users, their backs are wider, so the users can adjust the distance between the two cushions so that the cushions are located in the most comfortable position for support. This is conducive to making the user feel that the body is well supported during the massage, avoiding the situation where the cushions are too narrow to effectively contact the parts that need massage. It is like a tailor-made massage experience, which greatly improves the comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2It is a structural schematic diagram of the chair back frame of the present invention;

[0027] Figure 3 It is a schematic diagram of the vertical section structure of the chair back frame of the present invention;

[0028] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 It is a schematic diagram of the structure of the vertical section of the adjustment plate of the present invention;

[0030] Figure 6 For the present invention Figure 5 The enlarged view of point B in the middle;

[0031] Figure 7 is a schematic structural diagram of the second bevel gear of the present invention;

[0032] Figure 8 It is a schematic structural diagram of a vertical section of a first threaded rod of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the friction block of the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of a vertical section of a cushion of the present invention;

[0035] Fig.11 It is a schematic structural diagram of a vertical section of a massage ball rack of the present invention.

[0036] In the figure: 1, chair back frame; 2, torsion spring; 3, first slide; 4, cross bar; 5, electric push rod; 6, docking plate; 7, second slide; 8, adjustment plate; 9, first motor; 10, first bevel gear; 11, second bevel gear; 12, square limit rod; 13, third slide; 14, first threaded rod; 15, friction block; 16, friction ring; 17, rotating shaft; 18, connecting block; 19, pad; 20, cushion; 21, second motor; 22, square plate; 23, fourth slide; 24, massage ball holder; 25, second threaded rod; 26, third motor; 27, threaded hole; 28, fifth slide; 29, square block; 30, third threaded rod; 31, support rod; 32, sixth slide; 33, limit block; 34, seventh slide; 35, fourth motor. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 11 , the present invention provides a technical solution:

[0039] The ergonomically-adaptive massage chair comprises a backrest frame 1, a crossbar 4 which can be moved up and down is installed on the surface of the backrest frame 1, and adjustment plates 8 which can be moved left and right are installed at both ends of the crossbar 4, and a pad 19 is rotatably connected to the surface of each adjustment plate 8, an elastic supporting structure is installed between each pad 19 and the adjustment plate 8, and a friction component is installed between each pad 19 and the adjustment plate 8, and the friction component is used to limit the rotation of the pad 19;

[0040] A cushion 20 is installed on the surface of each pad 19, and a massage component is installed inside each cushion 20;

[0041] By installing rotatable cushions 20 on both sides of the massage chair, and installing an elastic support structure at the connection of the rotatable cushions 20, the elastic support structure can provide a certain support force. When the user lies on the massage chair, the rotatable cushions 20 will be squeezed and rotated by the user's back. When the user leans on the chair back frame 1, the cushions 20 will also be adaptively supported on both sides of the user's back under the elastic force of the elastic support structure, and then the massage components in the cushions 20 can massage the muscles on both sides of the user's back.

[0042] By installing a friction component at the connection between the adjustment plate 8 and the backing plate 19, when the back cushion 20 adaptively supports both sides of the user's back, the massage component increases the friction at the connection between the adjustment plate 8 and the backing plate 19, making it difficult to rotate the backing plate 19, thereby limiting the rotation of the backing plate 19, which is beneficial to prevent the massage component from exerting force on the user's back after starting the massage component. Due to the factors of action force and reaction force, the back cushion 20 rotates, thereby failing to achieve a good massage effect;

[0043] By setting the cross bar 4 to be movable up and down, the up and down height of the cushion 20 can be adjusted, so that the user can control the cushion 20 to be located at the most comfortable position for support, thereby preventing the back side of the user from not being well matched due to the difference in height of the user, and performing a comfortable massage;

[0044] By setting the adjustment plate 8 to be movable horizontally, the distance between the two cushions 20 can be adjusted. For overweight users, their backs are wider, so the users can adjust the distance between the two cushions 20 so that the cushions 20 are located at the most comfortable position for support. This is conducive to making the user feel that the body is well supported during the massage process, and avoids the situation where the cushions 20 are too narrow to effectively contact the parts that need massage. It is like a tailor-made massage experience, which greatly improves the comfort.

[0045] One side of each pad 19 is fixedly connected to a connecting block 18, and the upper and lower ends of each connecting block 18 are fixedly connected to a rotating shaft 17, and each rotating shaft 17 is rotatably connected to the adjustment plate 8 to realize the rotatable connection between the adjustment plate 8 and the pad 19. Furthermore, a baffle can be set on the back of the adjustment plate 8 to limit the maximum angle at which the pad 19 can rotate, which is conducive to setting a horizontal baffle, so that when the pad 19 rotates to the horizontal, it will be blocked by the baffle and cannot continue to rotate;

[0046] The elastic support structure includes a torsion spring 2, one end of which is fixedly connected to the adjustment plate 8, and the other end is fixedly connected to the connecting block 18. When the connecting block 18 rotates with the rotating shaft 17 as the axis, the torsion spring 2 will be twisted, causing the torsion spring 2 to undergo elastic deformation, and then the torsion spring 2 adaptively supports both sides of the user's back through this part of energy. As another embodiment, the elastic support structure includes an elastic arc plate, one end of the elastic arc plate is fixedly connected to the back of the adjustment plate 8, and the other end is fixedly connected to the back of the pad 19. When the connecting block 18 rotates with the rotating shaft 17 as the axis, the elastic arc plate undergoes elastic deformation.

[0047] The number of friction components is the same as the number of rotating shafts 17. The friction components include friction blocks 15 and friction rings 16. Each friction ring 16 is fixedly connected to each rotating shaft 17 in a one-to-one correspondence. The friction blocks 15 can be horizontally moved and arranged inside the adjustment plate 8. The friction is increased by the horizontal movement of the friction blocks 15 and the contact with the friction rings 16, thereby limiting the rotation of the rotating shaft 17 and thus limiting the rotation of the pad 19.

[0048] Furthermore, the surface of the friction block 15 is rotatably connected with the first threaded rod 14, and the interior of the adjustment plate 8 is provided with a threaded groove for the first threaded rod 14 to move horizontally. By rotating the first threaded rod 14, the first threaded rod 14 is matched with the threaded groove, and the first threaded rod 14 moves horizontally along the threaded groove, and drives the friction block 15 to move horizontally.

[0049] The second bevel gear 11 is connected to the internal rotation of the adjustment plate 8, and the surface of the second bevel gear 11 is coaxially fixedly connected with a square limit rod 12. One end of the first threaded rod 14 is provided with a third slide groove 13 for horizontal movement of the square limit rod 12. The back of the adjustment plate 8 is installed with a first motor 9, and the output end of the first motor 9 is coaxially fixedly connected with the first bevel gear 10. The first bevel gear 10 and the second bevel gear 11 are meshingly connected. By starting the first motor 9 to drive the first bevel gear 10 to rotate, the rotation of the first bevel gear 10 drives the second bevel gear 11 to rotate, and the rotation of the second bevel gear 11 drives the square limit rod 12 to rotate, and the rotation of the square limit rod 12 drives the first threaded rod 14 to rotate, and the rotation of the first threaded rod 14 drives the friction block 15 to move horizontally, so that the friction block 15 can be controlled to approach or move away from the friction ring 16. Please refer to Figure 5 and Figure 6, the transmission direction can be changed, and the first bevel gear 10 and the second bevel gear 11 are arranged to mesh and drive the first threaded rod 14 to rotate, so that when the thickness of the adjustment plate 8 is small, the first threaded rod 14 can be arranged in the adjustment plate 8 in parallel with the adjustment plate 8, which is beneficial to prevent the first threaded rod 14 from protruding and hindering the use of the massage chair.

[0050] Both ends of the cross bar 4 are fixedly connected with docking plates 6, and one end of each adjustment plate 8 is provided with a second slide groove 7 for horizontal movement of the docking plate 6. An electric push rod 5 is installed on the surface of each cross bar 4, and the telescopic end of each electric push rod 5 is fixedly connected to an adjustment plate 8 respectively. The adjustment plate 8 is driven to move left and right by starting the electric push rod 5 to extend and retract.

[0051] A rotatable third threaded rod 30 is provided on both sides of the seat back frame 1, and a threaded hole 27 is provided on the surface of each adjustment plate 8 for the third threaded rod 30 to penetrate the movable thread. The third threaded rod 30 is rotated to make the adjustment plate 8 move up and down along the surface of the third threaded rod 30. The movement of the adjustment plate 8 will drive the cross bar 4 and the pad 19 to move up and down together. The surface of the seat back frame 1 is provided with a first slide groove 3 for the cross bar 4 to move up and down, and by arranging the third threaded rod 30 on the adjustment plate 8, when the two adjustment plates 8 move horizontally left and right respectively to increase the distance between them, the third threaded rod 30 connects the adjustment plate 8 and the seat back frame 1, plays the role of a reinforcing rib, and is beneficial to increase the strength of the adjustment plate 8.

[0052] The lower end of the third threaded rod 30 is rotatably connected to the support rod 31, and the surface of the chair back frame 1 is provided with a sixth slide groove 32 for the support rod 31 to move left and right. The bottom end of the support rod 31 is fixedly installed with a fourth motor 35, and the output end of the fourth motor 35 is coaxially and fixedly connected with the lower end of the third threaded rod 30. Through such an arrangement, the fourth motor 35 can be started to drive the third threaded rod 30 to rotate, and the fourth motor 35 can move with the third threaded rod 30. The upper end of the third threaded rod 30 is rotatably connected to the square block 29, and the surface of the chair back frame 1 is provided with a fifth slide groove 28 for the square block 29 to move left and right. By providing the square block 29 and the support rod 31, it is beneficial to limit the moving trajectory of the third threaded rod 30. A limiting block 33 is fixedly installed on the surface of the support rod 31, and the groove wall of the sixth slide groove 32 is provided with a seventh slide groove 34 for the limiting block 33 to move left and right. By providing the limiting block 33, it is beneficial to limit the moving trajectory of the support rod 31.

[0053] The massage assembly includes a second motor 21 and a massage ball rack 24. The second motor 21 is fixedly mounted on the surface of the cushion 20, and the massage ball rack 24 is located inside the cushion 20. The second motor 21 is used to drive the massage ball rack 24 to rotate. When the cushion 20 supports the side of the user's back, the massage ball rack 24 is driven to rotate by starting the second motor 21, so that the massage heads on the massage ball rack 24 can knead and massage the side of the user's back.

[0054] The output end of the second motor 21 is coaxially fixedly connected with the square plate 22, and the surface of the massage ball rack 24 is provided with a fourth slide groove 23 for horizontal movement of the square plate 22. The second threaded rod 25 is rotatably connected in the fourth slide groove 23, and the movable thread of the second threaded rod 25 penetrates the surface of the square plate 22. By starting the second motor 21 to drive the square plate 22 to rotate, due to the cooperation and limitation between the square plate 22 and the groove wall of the fourth slide groove 23, the rotation of the square plate 22 will drive the massage ball rack 24 to rotate, so that the second motor 21 drives the massage ball rack 24 to rotate. A third motor 26 is fixedly installed on the surface of the massage ball rack 24, and the output end of the third motor 26 is coaxially fixedly connected with one end of the second threaded rod 25. By starting the third motor 26 to drive the second threaded rod 25 to rotate, due to the thread action of the second threaded rod 25 and the square plate 22, when the second threaded rod 25 rotates, the square plate 22 and the second threaded rod 25 will move relative to each other. Since the second motor 21 is fixed, the square plate 22 will also not move, so that the second threaded rod 25 drives the massage ball rack 24 to move as a whole. Please refer to Fig.10 and Fig.11 , the square plate 22 can be placed in an eccentric position on the surface of the massage ball rack 24. When the second motor 21 is started to drive the massage ball rack 24 to rotate, the massage ball rack 24 rotates in a pendulum-like manner, so that the upper end of the massage ball rack 24 has a relatively small moving trajectory and the lower end of the massage ball rack 24 has a relatively large moving trajectory as needed. For some obese people, the relatively small moving trajectory at the upper end may be adapted to the narrower shoulders because the shoulder space is relatively small. The smaller moving trajectory can ensure that the massage ball performs concentrated and precise massage in the shoulder area and will not deviate from the shoulder muscles due to the excessive range of motion. The relatively large moving trajectory at the lower end is adapted to the wider chest. The chest area has a wider muscle group, and the larger moving trajectory enables it to cover a wider area on the side of the chest, ensuring that the muscles on the side of the chest can be effectively stimulated.

[0055] The specific solution is as follows: according to needs, by starting the electric push rod 5 to extend and retract, the adjustment plate 8 is driven to move left and right, so that the docking plate 6 moves along the track of the second slide slot 7, and the movement of the adjustment plate 8 drives the pad 19 and the cushion 20 to move, so that the distance between the two cushions 20 can be adjusted. When the adjustment plate 8 moves left and right, it will drive the third threaded rod 30 to move left and right. The left and right movement of the third threaded rod 30 will drive the square block 29 to move left and right along the track of the fifth slide slot 28, and the support rod 31 to move left and right along the track of the sixth slide slot 32. The movement of the support rod 31 will drive the fourth motor 35 to move, and drive the limit block 33 to move along the track of the seventh slide slot 34.

[0056] As needed, the fourth motor 35 is started to drive the third threaded rod 30 to rotate, and the rotation of the third threaded rod 30 causes the adjustment plate 8 to move up and down along the surface of the third threaded rod 30. The movement of the adjustment plate 8 drives the cross bar 4, the pad 19, and the cushion 20 to move up and down, so as to adjust the height of the cushion 20.

[0057] When the user sits on the massage chair and leans against the backrest, the back cushion 20 is squeezed by the user's back, causing the pad 19 to rotate, causing the shaft 17 and the adjustment plate 8 to rotate, causing the torsion spring 2 to elastically deform. When the user leans against the backrest and the back is supported by the backrest frame 1, the torsion spring 2 adaptively supports both sides of the user's back through elastic energy;

[0058] As needed, the first motor 9 is started to drive the first bevel gear 10 to rotate, the first bevel gear 10 rotates to drive the second bevel gear 11 to rotate, the second bevel gear 11 rotates to drive the square limit rod 12 to rotate, the square limit rod 12 rotates to drive the first threaded rod 14 to rotate, the first threaded rod 14 rotates to drive the friction block 15 to move horizontally, so that the friction block 15 abuts against the surface of the friction ring 16, limiting the rotation of the rotating shaft 17;

[0059] As needed, the third motor 26 is started to drive the second threaded rod 25 to rotate. The rotation of the second threaded rod 25 causes relative movement between the second threaded rod 25 and the square plate 22, so that the massage ball rack 24 moves horizontally, and the relative position between the square plate 22 and the massage ball rack 24 is adjusted. Then, the second motor 21 is started to drive the square plate 22 to rotate. The rotation of the square plate 22 drives the massage ball rack 24 to rotate, so that the massage heads on the massage ball rack 24 massage the side of the user's back.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ergonomically adaptive massage chair, comprising a chair back frame (1), characterized in that: The surface of the chair back frame (1) is provided with a cross bar (4) that can move up and down, and both ends of the cross bar (4) are provided with adjustment plates (8) that can move left and right, and the surface of each adjustment plate (8) is rotatably connected to a pad (19), and an elastic support structure is installed between each pad (19) and the adjustment plate (8), and a friction component is installed between each pad (19) and the adjustment plate (8), and the friction component is used to limit the rotation of the pad (19); A cushion (20) is installed on the surface of each backing plate (19), and a massage component is installed inside each cushion (20); The massage assembly comprises a second motor (21) and a massage ball rack (24), wherein the second motor (21) is fixedly mounted on the surface of the back cushion (20), the massage ball rack (24) is located inside the back cushion (20), and the second motor (21) is used to drive the massage ball rack (24) to rotate; The output end of the second motor (21) is coaxially fixedly connected to a square plate (22); the surface of the massage ball rack (24) is provided with a fourth slide groove (23) for horizontal movement of the square plate (22); a second threaded rod (25) is rotatably connected in the fourth slide groove (23); a movable thread of the second threaded rod (25) penetrates the surface of the square plate (22); a third motor (26) is fixedly mounted on the surface of the massage ball rack (24); the output end of the third motor (26) is coaxially fixedly connected to one end of the second threaded rod (25).

2. The ergonomically adaptive massage chair according to claim 1, characterized in that: One side of each pad (19) is fixedly connected to a connecting block (18), the upper and lower ends of each connecting block (18) are fixedly connected to a rotating shaft (17), and each rotating shaft (17) is rotatably connected to the adjustment plate (8).

3. The ergonomically adaptive massage chair according to claim 2, characterized in that: The number of the friction components is the same as the number of the rotating shafts (17). The friction components include friction blocks (15) and friction rings (16). Each friction ring (16) is fixedly connected to each rotating shaft (17) in a one-to-one correspondence. The friction blocks (15) are horizontally movably arranged inside the positioning plate (8).

4. The ergonomically adaptive massage chair according to claim 3, characterized in that: The surface of the friction block (15) is rotatably connected to a first threaded rod (14), and the interior of the adjustment plate (8) is provided with a threaded groove for the first threaded rod (14) to move horizontally.

5. The ergonomically adaptive massage chair according to claim 1, characterized in that: A rotatable third threaded rod (30) is disposed on both sides of the chair back frame (1), and a threaded hole (27) is provided on the surface of each adjustment plate (8) for the third threaded rod (30) to move through.

6. The ergonomically adaptive massage chair according to claim 5, characterized in that: The lower end of the third threaded rod (30) is rotatably connected to a support rod (31); a sixth slide groove (32) is provided on the surface of the chair back frame (1) for the support rod (31) to move left and right; a fourth motor (35) is fixedly mounted on the bottom end of the support rod (31); an output end of the fourth motor (35) is coaxially fixedly connected to the lower end of the third threaded rod (30).

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